Dictionary.com
definitions
  • synonyms

principal quantum number

noun Physics.
  1. the nonnegative, integral quantum number that defines the stationary orbits in the Bohr model of the atom.
Show More

Origin of principal quantum number

First recorded in 1920–25
Also called total quantum number.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018